Kinematics of lateral tongue-pushing movement in coordination with masticatory jaw movement: An anteroposterior projection videofluorographic study.
Kinematics of lateral tongue-pushing movement in coordination with masticatory jaw movement: An anteroposterior projection videofluorographic study.
复制标题
与咀嚼下颌运动相协调的横向推舌运动的运动学：一项前后投影荧光摄影研究。
DOI：
10.1016/j.physbeh.2023.114315
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发表时间：
2023
影响因子：
2.9
通讯作者：
Palmer,JeffreyB
中科院分区：
文献类型：
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作者：
Iida,Takatoshi;Matsuo,Koichiro;Iida,Yuki;Okazaki,Hideto;Yoda,Mitsumasa;Taniguchi,Hiroshige;Brodsky,MartinB;González-Fernández,Marlís;Palmer,JeffreyB
目的在咀嚼固体食物的过程中，当张开颌骨时，舌头向外推动推进剂，将其放置在咬合面上。这种运动被称为推舌(TP)。茶多酚在有效咀嚼中起着重要作用，但其运动学机制尚不清楚。本研究量化了TP的运动学及其与咀嚼下颌运动的协调性。方法14名健康青年分别吃6 g饼干和肉，记录正位投射的视频透视(VFG)。小铅标记被粘在舌面(左、右、前)和颊牙面(上磨牙和下尖牙)上。以右上磨牙为起点，用笛卡尔坐标量化舌和下尖牙标志相对于上牙合平面的位置。咀嚼过程中的下颌运动根据食物和舌头标记的横向运动被分为TP周期和非TP周期。压缩食物颗粒的颌侧被定义为工作侧，而另一侧被称为平衡侧。比较TP周期与非TP周期舌体和颌骨标志物的水平位移和垂直位移，以及不同食物类型的舌体和颌骨标志物的水平和垂直位移。对于前侧和工作侧舌标，TP组的垂直移位也显著大于非TP组。结论TP是由工作侧舌面和前舌叶的旋转和侧向运动以及平衡侧舌面的内侧运动完成的。这些运动产生舌面向工作侧的侧移和旋转，与张开的下巴相协调。设计练习以提高舌体的横向运动和旋转的力量，对于舌头进食和吞咽功能受损的人可能是有用的。
ObjectiveDuring the mastication of solid food, the tongue pushes the bolus laterally to place it onto occlusal surfaces as the jaw is opened. This movement is referred to as tongue-pushing (TP). TP has an important role in efficient chewing, but its kinematic mechanisms remain unclear. The present study quantified the kinematics of TP and its coordination with masticatory jaw movements.MethodsVideofluorography (VFG) in anteroposterior projection was recorded while 14 healthy young adults ate 6 g each of cookies and meat. Small lead markers were glued to the tongue surface (left, right, and anterior) and buccal tooth surfaces (upper molars and lower canines). The position of the tongue and lower canine markers relative to the upper occlusal plane was quantified with Cartesian coordinates, using the right upper molar as the origin. Jaw motion during chewing was divided into TP and Non-TP cycles, based on the lateral movement of the food and tongue markers. The side of the jaw that compressed food particles was defined as the working side, while the other side was termed the balancing side. Horizontal and vertical displacements of tongue and jaw markers were compared between TP and Non-TP cycles, as well as between food types.ResultsThe mediolateral displacement of all tongue markers was significantly larger in TP than in Non-TP cycles. Vertical displacement was also significantly greater in TP than in Non-TP cycles for the anterior and working side tongue markers. TP cycles occurred more frequently with meat-chewing than with cookie-chewing.ConclusionTP is accomplished by rotation and lateral movements of the tongue surface on the working side and the anterior tongue blade, along with medial movement on the balancing side. These movements produce lateral shift and rotation of the tongue surface toward the working side in concert with jaw opening. Designing exercises to improve the strength of the lateral motion and rotation of the tongue body may be useful for individuals with impaired tongue function for eating and swallowing.